420854360 Power Valve Housing for Sea-Doo SPX 800 1997-1998

Power Valve Housing for Sea-Doo

This power valve housing (OEM cross-reference 420854360) is the component that houses and guides the power valve assembly on Sea-Doo 800 engines, helping regulate exhaust port timing for stronger mid-range and top-end power.

Overview

This power valve housing is a direct-fit replacement component for the Sea-Doo SPX 800, serving as the enclosure that supports the power valve mechanism on the 800cc Rotax engine. It helps maintain correct valve alignment so exhaust timing stays consistent across the rev range. It is intended for riders and mechanics servicing or rebuilding the top end of a Sea-Doo SPX 800.

Built For Performance

• Designed to hold and guide the power valve assembly for consistent exhaust port timing
• Constructed to withstand the heat and vibration of two-stroke marine engines
• Matches OEM dimensions for straightforward installation
• Helps restore factory power delivery on the 800cc Rotax engine
• Sold as a single housing unit

Fits These Machines

• for Sea-Doo SPX 800 (1997-1998)

On-The-Job Use

• Top-end rebuilds and power valve servicing on Sea-Doo 800 engines
• Restoring exhaust valve function after wear or sticking
• Routine maintenance of the 800cc Rotax power valve system

Specs At A Glance

Good To Know

Q: Is this an original Sea-Doo part? A: This is an aftermarket power valve housing made to fit Sea-Doo 800 engines and is referenced by OEM number 420854360. It is not affiliated with or produced by the original manufacturer.

Q: Will this fit my 1997-1998 SPX 800? A: It is listed for the Sea-Doo SPX 800 from 1997 through 1998 with the 800cc engine. Always confirm your model and serial number before ordering to be sure of compatibility.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.